Rubbery solid electrolytes with dominant cationic transport and high ambient conductivity

Article Abstract:

High-voltage, lightweight rechargable batteries based on solid electrolytes are important for electrically powered vehicles. A potential ionic conductor in which lithium salts are mixed with small quantities of the polymers polypropylene oxide and polyethylene oxide is described. These 'polymer-in-salt' materials have low glass transitions that allow it to remain rubbery at room temperature while preserving good lithium-ion conductivites and high electrochemical stability.

Automotive batteries, Automobiles, Electrolytes, Electrolytic conductivity, Electrolytic cells

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A thermodynamic connection to the fragility of glass-forming liquids

Article Abstract:

Research is presented describing a thermodynamic connection to the kinetic fragility of liquids used to form glass. There are liquids of all types (metallic, ionic or molecular) that supercool and solidify at the glass transition temperature, but the process can be extremely diverse within each liquid class and the reason for the diversity has not been known.

Glass, Supercooled liquids, Fluid dynamics, Viscosity, Thermodynamics

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Vitrification of a monatomic metallic liquid

Article Abstract:

Molecular dynamics simulation is used for creating conditions for successful vitrification of metallic liquid germanium. The results have provided evidence for a rare polyamorphic transition preceding crystallization of the diamond cubic phase.

Science & research, Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Germanium, Analysis, Molecular dynamics, Crystallization

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